Table 1. Effects of stocking density (14 and 22 birds/m²) and different light system on performance of broiler chickens at 35 days

Treatments		Body weight (g)	Weight gain (g)	Feed intake (g)	FCR
Density (birds/m2)	Light
14	IB	2,067.6b	2,024.0b	3,287.8a	1.62a
	LED Yellow	2,092.5ab	2,049.0ab	3,305.0a	1.61ab
	LED White	2,119.9a	2,076.3a	3,336.0a	1.60b
22	IB	1,949.7c	1,907.2c	3,015.6b	1.58c
	LED Yellow	1,968.7c	1,926.0c	3,051.7b	1.59c
	LED White	1,977.5c	1,934.8c	3,038.7b	1.57c
----------------------------------------- Main effect -----------------------------------------
Light	IB	2,008.7	1,965.6	3,151.7	1.60
	LED Yellow	2,030.6	1,987.5	3,178.3	1.60
	LED White	2,048.7	2,005.6	3,187.3	1.59
Density	14	2,093.3a	2,049.8a	3,309.6a	1.61a
	22	1,965.3b	1,922.7b	3,035.3b	1.58b
SEM		14.5	14.4	29.8	0.01
P-value
Light × Density		<0.01	<0.01	<0.01	<0.01
Light		0.55	0.54	0.89	0.42
Density		<0.01	<0.01	<0.01	<0.01

values with the same letters in a column are significantly different (P<0.05).
IB, incandescent white bulb; FCR, feed conversion ratio; SEM, standard error of the mean.